The mind is the most important thing in tennis.

我写作是为了理解世界，也是为了让世界理解我。

不要仅仅满足于比同辈或前人优秀，努力超越自己。

The ocean feeds us, and it's our responsibility to ensure we feed it back with care and respect.

预测未来的最好方法就是去发明它。